SG100-R Fixed Remote Gas Detector for CH4 with 0–100%LEL Range 1%LEL Resolution and Transmitter Sensor Separation Up To 1000m

Advanced fixed remote gas detection system designed for methane (CH₄) monitoring with extended distance capability between transmitter and sensor.

A remote fixed gas detector where the sensor can be placed up to 1000 meters away from the transmitter. Ideal for duct pipelines, heavy gases (NH₃, H₂, etc.), or hard to access areas. Detects methane (CH₄) from 0–100%LEL with 1%LEL resolution using a catalytic bead sensor. Features IECEx/ATEX certification (Ex db IIC T6), IP66/IP68 protection, 3 relays (low/high/fault), 4 20mA, RS485, and LED display. Configured via non intrusive magnetic wand or remote control. Comes with mounting bracket.

The SG100-R is a gas transmitter designed for use with remotely mounted gas sensors. This configuration is ideal when the sensor must be placed in a duct, pipeline, or where the gas is heavier than air (e.g., NH₃, H₂), while the transmitter is mounted at a convenient, accessible location for viewing the display and performing configuration.

Taking methane (CH₄) as an example, the SG100-R uses a catalytic combustion sensor to measure concentrations from 0–100%LEL with a resolution of 1%LEL. Accuracy is ≤ ±2–5% FS (depending on sensor).

The transmitter connects to the sensor via RS485, supporting distances up to 1000 meters. It is compatible with hundreds of gas sensor types – catalytic, IR, electrochemical, PID, etc.

Outputs include 3 wire 4 20mA, RS485 Modbus, and 3 relay outputs (low alarm, high alarm, fault alarm). The LED display shows real time readings. Configuration is safe and non intrusive using a magnetic wand or optional remote control – no need to open the enclosure in hazardous areas.

The housing is die cast aluminum (SS316 optional). Protection rating IP66/IP68 ensures reliable operation in dusty, wet, or submerged environments. The unit is IECEx/ATEX certified with explosion proof grade Ex db IIC T6 Gb.

Methane is the primary component of natural gas. It is colorless, odorless, and highly flammable. In concentrations between 5% and 15% by volume in air, it forms an explosive mixture. The LEL (Lower Explosive Limit) of methane is 5% VOL, which corresponds to 100% LEL on the detector. Therefore, measuring 0–100%LEL directly indicates how close the atmosphere is to becoming explosive. Common sources include natural gas pipelines, landfills, coal mines, and biogas plants. The SG100 R helps provide early warning of flammable leaks, especially in remote or hard to reach locations.

• Remote sensor placement – Up to 1000 meters between sensor and transmitter; ideal for ducts, heavy gases, or inaccessible areas.
• IECEx/ATEX certified – Ex db IIC T6 Gb for Zone 1/2 hazardous areas.
• IP66/IP68 protection – Waterproof, dustproof, and submersible.
• Multiple outputs – 3-wire 4-20mA, RS485, and 3 relays (low/high/fault).
• Wide sensor compatibility – Catalytic, IR, electrochemical, PID – hundreds of gas types.
• Non-intrusive configuration – Magnetic wand or remote control – safe for explosive atmospheres.
• LED display – Local concentration readout.
• Robust enclosure – Die-cast aluminum (SS316 optional).
• Easy installation – Comes with mounting bracket; standard 4NPT & M20 cable entries.
• Wide operating temperature – Catalytic sensor works from -40°C to +70°C.

• Duct pipelines – Monitor gas inside ventilation or exhaust ducts.
• Heavy gas detection – Gases like NH₃, H₂, or H₂S that settle at low points; place sensor near floor, transmitter at eye level.
• Confined space entry – Sensor inside tank/vessel, transmitter outside for safe viewing.
• Landfills & biogas plants – Methane monitoring in collection wells or digesters.
• Natural gas compressor stations – Remote sensor in valve pits.
• Oil & gas refineries – Monitor fugitive emissions in hard to access areas.
• Wastewater treatment – Digester gas (methane) monitoring.
• Coal mines – Remote sensing in return airways or goaf areas.

1. How far can the sensor be from the transmitter?
   Up to 1000 meters using RS485 communication.
2. Can I use the SG100-R with other gases besides methane?
   Yes. It supports hundreds of gas sensors: catalytic (flammables), IR (CO₂, CH₄), electrochemical (toxic), PID (VOC). Contact us for specific gas configurations.
3. Does the transmitter have a display?
   Yes, an LED display shows real time gas concentration.
4. How do I configure the alarm set points without opening the enclosure?
   Use the included magnetic wand (non intrusive) or optional remote control – safe for hazardous areas.
5. What relays are available?
   Three relays: low alarm, high alarm, and fault alarm. They can directly control external alarms, fans, or solenoid valves.
6. What is the protection rating?
   IP66/IP68 – dust tight, protected against powerful water jets, and submersible.
7. What is the warranty period?
   1 year for the transmitter and sensor (consumables may have shorter warranty).
8. Do I need a separate power supply for the sensor?
   No. The transmitter powers the remote sensor via the RS485 connection.
9. Can I mount the sensor in a duct or pipeline?
   Yes. The remote sensor can be installed in ducts, stacks, or pipes; the transmitter is mounted in a safe, accessible location.
10. Is the SG100-R certified for explosive atmospheres?
    Yes. It has IECEx and ATEX Ex db IIC T6 Gb certification for Zone 1 and Zone 2 hazardous areas.

Shenzhen YuanTe Technology Co., Ltd. (brand: Safegas) was established in 2010 and specializes in the R&D, manufacturing, and sales of gas detection equipment and integrated systems. With over 16 years of industry expertise, the company serves sectors including oil & gas, chemicals, environmental protection, electronics, municipal engineering, agriculture, and household appliances. All products are manufactured under ISO9001 and ISO45001 management systems, holding international certifications such as IECEx, ATEX, and EMC. With an annual production capacity of over 80,000 units, YuanTe Technology supplies gas detection solutions to customers worldwide.

• Established since 2010 – Over 16 years of experience in gas detection R&D and manufacturing.
• Full product range – Portable detectors, fixed transmitters, analyzers, control panels, docking stations, accessories.
• International certifications – IECEx, ATEX, EMC certified for hazardous areas.
• Wide gas & industry coverage – Hundreds of gases; serve oil & gas, chemical, mining, environmental, food, pharma, and more.
• Strong R&D & quality – ISO9001 & ISO45001 certified; professional R&D team and global service network.
• High production capacity – Over 80,000 units per year with fast delivery (5–7 working days typical).
• Global customer support – 24/7 after sales service and solutions tailored to diverse industries.